How bad do they heat up on the streets? I know you need a cooler but does it still heat up bad? What kind of 60's are you cutting? What is your set up? How streetable is the 4000?

 

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I drove my truck on the highway for over an hour with the converter unlocked in 4th gear (don't ask) at 75mph + and it didn't heat up over 140-150. This is in Texas summer heat, with a truecool 40,000gvw cooler.

I can hot lap my truck at the track repeatedly, that truecool keeps it very cool.

This is with a Circle-D ~3800ish converter

I also was cutting consistent 1.8's, but my truck isn't all that fast. I'd imagine with more power you could cut some very low 60s with that loose of a converter. Daily driving isn't bad at all IMO.

 

4400 yank 160-170 on normal driving- 180 on WOT runs-
this is on 70-80* weather , on a tru-cool 40k , no 60ft yet.
- planning on getting a fan infront of cooler to lower 10*